Edward c



(No Model.) v

- A. s. KRoTz.

y 'BOILER- N5. 551,559. Y Patented D55. 17, 1595.

' flowing is a specification,

50. View on the line y A LvARo s.l knorz, or srRINGieLD, oHIorAssIGNon or YN, or SAME PLACE.

EDWARD C..

` Ainrvfr Fries,

ONE-THIRD To Isoll-.Eng

" 'SPECEIFIOAIlN forming part of Letters Patent No.- 551,589; dated December 17,

' Applicashun may is,y 1895. semina-549,743. (rommel.)

Tc au whom .it .may concern Be it Yknown` thatv I, ALVARO S. vK Rolrz, a `citizen of the United States,.residing at Spring! iield, in-the county of` Clark and Statel of have invented certain new and useful 'Improvements in Boilers, of which the folreference being had therein to the accompanying drawings. This invention relates to certain newand 1o useful improvements in waterstube steamboilers. l v

The particular 'object I have in view is to s o manage the fl're and hot gases or products r of combustion that the tubes shall be wholly 1' 5 surrounded and enveloped thereby, as `distinguished from the present method in such cases, vWherein believe the 'fact Ato be that .whole rows 'of ltubes in each battery are so -backedwitli haine-walls that the flames and 2o heat cannot wrap around them, being-permittedkmelfely 13e-,strike against 7them, and being then Ibaffled or deflected back by` the baiiiefwalls.' This object I aecomplishby ar- -ranging my baie or diverting walls wholly z5 out of 4contact with-any of the tubes and in a position between the banks of tubes, in the respective 'batteries of the boiler.

Another object of my invention isto provide for cooling the down-current tubes by v3o utilizing thenatural draft of the apparatus to draw air from the outside into conduits in which such pipes are located. This results 1 n superinducing a, rapid return-current,

, which accelerates the speed ofthe circulat-- 3,5 ing water.

A third object is tosc construct a commo-n head-tank. for all the banksy of tubes that'it' will readily receive the ends of the4 tubes and that the water in such tank will beretard'ed 4o in speed asitpasses fromj one. battery to the 'next in the series. of batteries, so vthat there 1 shall be less tendency to disturb the individual circulation in the individual batteries. y In the accompanying drawings, on which 45 `like reference-letters indicate corresponding parts, Figurel 1 is a vertical lsectional view of a water-tube boiler embracing my improve menta,l the section being taken on the line t a: of Fig. 2 g.. and Fig. 2, a transverse sectional 'y of Fig. 1.

`currents of atmospheric natural draft of the apparatus acting through' down-current tubes induce the rapid descent of the water through A generalstructure A, of masonry, forms the setting for the boiler. This structure .includes a 'fire-box B, grate-bars C, and an ash-piti). The Walls are lined with iire-brick provide them with openings I and J for thev passage of the flames and products of combustion to the stackopening K, whence 4they are carried oii by any form of smoke-stack. At this point it .will also be observed that at L a line is indicated marked Hoon Considerable of the boiler i is below this line. When so 'constructed-the boiler will be use# ful particularly as a marneboiler, the lower.

extension'being beneathfthe floor, so as to -get the weight well down in the hull ofthe vessel.

In the lower vpart of the structurel I place transverse'drums1 M, O, and P, the rst being also the feedfdrum, into which the Water is in- .troduced through a pipe Q from a suitable supply. Each of these drums'has connectedd to it two sets or banks of tubes, one set being theup-curre'nt tubes' shown .at R, S, and T, and

thel other composed of dovtourrent tubes.

(Shown at U in Fig. 2.) vThe lattertubes are the side walls and are subjected to inilowing air induced by the apertures W and X, as lshown in Fig. 2. The purpose of this cons some extent to superthese tubes, which results in accelerating the vplaced in conduits or passages V formed in truction'is to cool the return -or up currentgwhile Anot appreciably ertures W may,

bottom, so as to'readily receive the' twosets.

of steam. The ap-fo'c if desired, be closed, 'say by .a plug Y', though usually they willfbevleft open. Now each of these respective sets of affecting the temperature to-a degree inju-' rions to'th-e generation oiV tubes of each drum'. j There are as. many of these chambers as there are drums,and

' nxitting of the intercommunn'ation or circulation of the water in the tank over each bank of tubes, still anything like'a rapid n1ove /r ull opportunity low 'the parts.. A y

drums and tubes fromthempper structure ment of the water is prevented, and thus the vertical circulation oi the water (the more important direction of circulation) is given to take place. Referringagain to the baiiiewalls G and H and the sets of banks of tubes S and T, as also referring to the irelwall F (which in effect is a baie-wall) and the bankofl tubes R, it will be seen that the iaxnes wholly embrace and envelopall of the tubes of each bank, and that there is no place of contact between any of such tubesan djany of 'such Walls.- This in practice produces marked resnlts in the direction of a more intense heating of all the tubes, and l particularly those which are nearest such walls, and which heretofore have been-in immediate contact with them. A more rapid circulation hence fol'- lows,as also a quicker generation ofstealn. It

will be further observed that the drums M O P and the tubes R, S, andU are suspended from the upper tank Z, which latter rests upon the dwalls, as indicated. Thus provision is made for the free expansion and contraction of the tubes withoutinjury to the other parts or liability to displace them. The baiiiefwalls, be' ing in vertical contact with the drums, act as guides for them to keep them in place, yet althemto have a slight up-and-down-movement Without straining and tending to crack This idea of suspending the lower -and heat can and do lpending Vfrom said contact with the santes believe to be-anewione, .and accordingly layv claim thereto. Y Having thus fully described my invention,

`what I claim as new; and desire to secure by 1. In a water tube boiler, 'the combinationV with two or more drums and their banks of tubes, of a water tankinto which said tubes open, and-a partition between each bank of tubes and withinsaid' tank and havingan opening. ,r r 2. In a water tube' boiler, the combination with a drum, a set of tubesoonnected thereto for the up current ofiwater and a'set of tubes connected thereto for. the'down current of water, a vessel. with which allof said tubes connect andv walls with conduits in 'which the second setof tubes'arelocated, 'draft openings .in said walls leading fromthe outer air to the conduits and from the conduits to the interior o f` the structure. y

3T In a water tube boiler, the 'combination` with an upper vessel supported by the walls l of the apparatus, of the circulating tubesdevessel-.and the drums sus-y pended by said tnbes,deecting walls between said deiiectingA walls being o ut of tubes but in vertical contact withl the drums and adapted to guide the drums. 1 f i 4. In a water tube boiler, the combination' ive drums,

the respective banks of tubesand the 'respectwith-'the uppervessel supported bythe walls of the apparatus, ofthe circulating tubes de-` pending from said vessel and the drums suspended by said tubes, and defiecting walls between the banks ofy tubes and the drums, said walls acting'to guide said drums, and the arrangement'aflording provision for expansion and contraction.

In testimony whereof- I afiix my signature..

in presence of two witnesses. ALVARO S. KROT Witnesses: y

l W. M. MCNAIR, l WARD SNYDER. 

